This is a task from the Illustrative Mathematics website that is one part of a complete illustration of the standard to which it is aligned. Each task has at least one solution and some commentary that addresses important asects of the task and its potential use. Here are the first few lines of the commentary for this task: Pencils are packed 10 in a box. A classroom carton has 10 boxes. Jem has 1 carton and 4 boxes. How many pencils does Jem have all together? Lee needs t...

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